Mr. O'Malley speaks at his gubernatorial rally in Bowie on Thursday. Democratic Majority Leader Steny H. Hoyer and Sen. Barbara A. Mikulski also stumped for the governor.

Mr. O'Malley speaks at his gubernatorial rally in Bowie on Thursday. Democratic Majority Leader Steny H. Hoyer and Sen. Barbara A. Mikulski also stumped for the governor.